Mind you, HS didn't do themselves any favours by their very generously allowing representatives from Boeing to have a full tour of the factory etc in the early 1960s-enter the 727, the most successful jetliner of all time, until sales of the 737 surpassed its (huge) total.
This months Arliner Classics magazine has an artists impression of the proposed twin engine derivative of the Trident. The resemblance to the 757 is striking.